• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Mechanisms underlying enhanced GLP-1 response in diet-induced obesity

Research Project

Project/Area Number 19K05860
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 38050:Food sciences-related
Research InstitutionHokkaido University

Principal Investigator

Hira Tohru  北海道大学, 農学研究院, 准教授 (10396301)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords消化管内分泌系 / GLP-1 / 食事誘導性肥満 / 消化管ホルモン / 糖尿病
Outline of Research at the Start

食事誘導性の肥満において、消化管がどのように関わるかはよくわかっていない。本研究課題では、消化管ホルモンの一つであるGlucagon-like peptide-1(GLP-1)に着目している。GLP-1は食後即座に消化管内分泌細胞から分泌され、膵臓からのインスリン分泌を増強したり、視床下部に働きかけて満腹感をもたらす。申請者は食事誘導性肥満の際にGLP-1の分泌が高まることを見出し、動物、培養細胞を用いてこのメカニズムを明らかにすること目的とする。これにより、GLP-1の分泌や産生をコントロールして肥満や耐糖能異常の予防改善に資する知見を得る。

Outline of Final Research Achievements

We discovered an increased meal-induced GLP-1 secretion in a diet-induced obesity model rats. We aimed to elucidate the underlying mechanism. In a genetically diabetic model, long-term administration of an obesity-inducing diet did not induce an adaptive increase in GLP-1 secretion. The adaptive increase in GLP-1 secretion occurred in the distal small intestine, and an increased GLP-1 secretion response was observed for carbohydrates, lipids, and proteins. Since there were no differences in GLP-1 content or the number of GLP-1-producing cells in the small intestinal mucosa, it was hypothesized that the adaptive increase in GLP-1 secretion may be attributed to enhanced nutrient sensitivity in GLP-1-producing cells.

Academic Significance and Societal Importance of the Research Achievements

消化管において栄養素を感知して、消化管ホルモンを分泌することで食後の生理応答をコントロールする消化管内分泌系を理解することは、食事を利用して生体応答をコントロールできる技術開発に資する。また、病態における消化管内分泌系の関与を理解し、その分子メカニズムを知ることは、病態の予防、改善に貢献できる。本研究では血糖値や食欲をコントロールする消化管モルモンであるGLP-1の分泌機構の食環境への適応機構の一端を明らかにすることで、学術的・社会的貢献を目指した。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (18 results)

All 2021 2020 2019

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Improvement of Glucose Tolerance by Food Factors Having Glucagon-Like Peptide-1 Releasing Activity2021

    • Author(s)
      Hira Tohru、Trakooncharoenvit Aphichat、Taguchi Hayate、Hara Hiroshi
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 12 Pages: 6623-6623

    • DOI

      10.3390/ijms22126623

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Blood Sampling From Rat Ileal Mesenteric Vein Revealed a Major Role of Dietary Protein in Meal-Induced GLP-1 Response2021

    • Author(s)
      Hira Tohru、Sekishita Madoka、Hara Hiroshi
    • Journal Title

      Frontiers in Endocrinology

      Volume: 12 Pages: 1-8

    • DOI

      10.3389/fendo.2021.689685

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Acute Oral Calcium Suppresses Food Intake Through Enhanced Peptide-YY Secretion Mediated by the Calcium-Sensing Receptor in Rats2021

    • Author(s)
      Igarashi Akiho、Ogasawara Shono、Takagi Ryo、Okada Kazufumi、Ito Yoichi M、Hara Hiroshi、Hira Tohru
    • Journal Title

      The Journal of Nutrition

      Volume: 151 Issue: 5 Pages: 1320-1328

    • DOI

      10.1093/jn/nxab013

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Diet-induced obesity enhances postprandial glucagon-like peptide-1 secretion in Wistar rats, but not in diabetic Goto-Kakizaki rats2020

    • Author(s)
      Pinyo Jukkrapong、Hara Hiroshi、Hira Tohru
    • Journal Title

      British Journal of Nutrition

      Volume: - Issue: 4 Pages: 1-13

    • DOI

      10.1017/s000711452000433x

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Glucagon-like peptide-1 response to whey protein is less diminished by dipeptidyl peptidase-4 in comparison with responses to dextrin, a lipid and casein in rats2020

    • Author(s)
      Shimizu Yuki、Hara Hiroshi、Hira Tohru
    • Journal Title

      British Journal of Nutrition

      Volume: 125 Issue: 4 Pages: 398-407

    • DOI

      10.1017/s0007114520002834

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Expression of serotonin receptor HTR4 in glucagon-like peptide-1-positive enteroendocrine cells of the murine intestine2020

    • Author(s)
      Okumura Motoshi、Hamada Akihiro、Ohsaka Fumina、Tsuruta Takeshi、Hira Tohru、Sonoyama Kei
    • Journal Title

      Pfl?gers Archiv - European Journal of Physiology

      Volume: 472 Issue: 10 Pages: 1521-1532

    • DOI

      10.1007/s00424-020-02453-7

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] What Is GLP-1 Really Doing in Obesity?2020

    • Author(s)
      Hira Tohru、Pinyo Jukkrapong、Hara Hiroshi
    • Journal Title

      Trends in Endocrinology & Metabolism

      Volume: 31 Issue: 2 Pages: 71-80

    • DOI

      10.1016/j.tem.2019.09.003

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Enhanced postprandial glucagon-like peptide-1 secretion during obesity development has a protective role against glucose intolerance induction in rats2019

    • Author(s)
      Pinyo Jukkrapong、Hira Tohru、Hara Hiroshi
    • Journal Title

      British Journal of Nutrition

      Volume: 122 Issue: 04 Pages: 411-422

    • DOI

      10.1017/s0007114519001223

    • NAID

      120006882089

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] ラットにおけるえごま油長期摂取は、食事刺激に対するGLP-1分泌応答および持続性を高める2021

    • Author(s)
      木村梨乃,佐野杏莉,比良徹
    • Organizer
      令和3年度日本栄養・食糧学会 東北支部(第55回大会)・北海道支部(第51回大会)合同支部大会およびシンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 食事誘導性肥満ラットにおける消化管部位別のGLP-1分泌応答と組織解析2021

    • Author(s)
      佐野 杏莉、比良 徹
    • Organizer
      日本農芸化学会2021年度大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 消化管内分泌系への作用を介する糖代謝改善ペプチド2021

    • Author(s)
      比良 徹
    • Organizer
      日本農芸化学会2021年度大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ラットにおける大豆タンパク質経口投与時のGLP-1分泌応答と血中DPP-4活性の低下2020

    • Author(s)
      村井 佳奈、比良 徹
    • Organizer
      日本アミノ酸学会第14回学術大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ラットにおける伸展刺激負荷による GLP-1 分泌応答の解析2020

    • Author(s)
      木村 夏織,比良 徹
    • Organizer
      2020年度 日本農芸化学会北海道支部/第50回 日本栄養・食糧学会北海道支部 合同学術講演会 優秀発表賞/若手奨励賞
    • Related Report
      2020 Research-status Report
  • [Presentation] 食事誘導性肥満ラットにおけるGLP-1分泌応答の増強には回腸部が寄与する2020

    • Author(s)
      佐野 杏莉、比良 徹
    • Organizer
      日本農芸化学会 2020年度大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Postprandial GLP-1 response was enhanced in non-diabetic rats, but not in diabetic rats during obesity development2019

    • Author(s)
      Jukkrapong PINYO, Tohru HIRA, Hiroshi HARA
    • Organizer
      International Diabetes Federation 2019 (IDF 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 肥満誘導食摂取ラットにおけるたんぱく質投与に対するインクレチン分泌の変化2019

    • Author(s)
      田中 里実,原 博,比良 徹
    • Organizer
      日本アミノ酸学会第13回学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 食事誘導性肥満ラットにおける小腸上部と下部での GLP-1 分泌応答の違 い2019

    • Author(s)
      佐野 杏莉、比良 徹
    • Organizer
      第5回北海道大学部局横断シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] 食事誘導性肥満ラットにおけるGLP-1の分泌応答と小腸上部および下部での違い2019

    • Author(s)
      佐野 杏莉、比良 徹
    • Organizer
      日本農芸化学会 北海道支部第2回講演会
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi